And, yet, I could not come up with a single use case that I think will most likely go mainstream soon when an investor asked me what my favorite consumer use-case in the bot space is.
Chatbots will make a splash in the enterprise first
Sar Haribhakti

I should go something like this:

Aiding my productivity with regards to daily challenges like information discovery, access, and sharing.

Every piece of Software is a Bot that simply lacks the natural conversation UX provided by conversation channels e.g., IRC, various vendor-specific messaging platforms.